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Wei X, Liang J, Liu J, Dai Y, Leng X, Cheng Y, Chi L. Anchang Yuyang Decoction inhibits experimental colitis-related carcinogenesis by regulating PPAR signaling pathway and affecting metabolic homeostasis of host and microbiota. JOURNAL OF ETHNOPHARMACOLOGY 2024; 326:117995. [PMID: 38428656 DOI: 10.1016/j.jep.2024.117995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 02/26/2024] [Indexed: 03/03/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Inflammatory bowel disease (IBD) presents a risk of carcinogenesis, which escalates with the duration of IBD. Persistent histological inflammation is considered to be the driving factor of colitis carcinogenesis. Effective control of inflammation is helpful to prevent and treat colitis-related colorectal cancer (CAC). Anchang Yuyang Decoction (AYD), a traditional Chinese medicine (TCM) formula, is originated from the ancient prescription of TCM for treating colitis and colorectal cancer. AYD has demonstrated efficacy in treating IBD and potential anti-carcinogenic properties. AIM OF THE STUDY This research aims to assess the therapeutic efficacy of AYD in ameliorating experimental colitis-related carcinogenesis induced by AOM/DSS. It further seeks to elucidate its potential mechanisms by integrating multiple omics sequencing approaches. MATERIALS AND METHODS A rat model for colitis-related carcinogenesis was developed using azoxymethane (AOM)/dextran sulfate sodium (DSS). UPLC-MS identified AYD's chemical constituents. Rats were administered varying doses of AYD (18.37, 9.19 and 4.59 g/kg) orally for 53 days, with mesalazine as a positive control. The study evaluated anti-carcinogenic effects by examining adenoma number, adenoma load, abnormal crypt foci (ACF), histopathological damage, and tumor-related protein expression. Anti-inflammatory and reparative effects were assessed through body weight, disease activity index (DAI), colon length, spleen index, inflammatory cytokine levels, and tight junction protein expression. The effects on intestinal microbiota and host metabolism were explored through 16S rRNA sequencing, targeted short-chain fatty acid (SCFA) metabonomics, and non-targeted colon metabolomics. Potential AYD targets were identified through transcriptomic sequencing and validated by qRT-PCR and western blotting. RESULTS AYD significantly reduced adenoma number, adenoma load, neoplasm-associated lesions, ACF, and tumor-related protein expression (e.g., p53, PCNA) in AOM/DSS-induced rats, thus impeding colitis-related carcinogenesis progression. AYD also alleviated histopathological damage and inflammation, promoting intestinal mucosal barrier repair. Furthermore, AYD modulated intestinal flora structure, enhanced SCFA production, and regulated colon metabolites. Transcriptomic sequencing revealed a significant impact on the peroxisome proliferator-activated receptor (PPAR) signaling pathway. Subsequent qRT-PCR and western blotting experiments indicated AYD's influence in up-regulating PPAR-γ and down-regulating PPAR-α, PPAR-β/δ, and related proteins (thrombomodulin [Thbd], fatty acid binding protein 5 [Fabp5], stearoyl-CoA desaturase 2 [Scd2], phospholipid transfer protein [Pltp]). CONCLUSIONS This study demonstrates AYD's ability to inhibit experimental colitis-related carcinogenesis induced by AOM/DSS. Its mechanism likely involves modulation of the PPAR signaling pathway, impacting intestinal microbiota and host metabolic equilibrium.
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Affiliation(s)
- Xiunan Wei
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China.
| | - Junwei Liang
- Department of Gastroenterology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250014, China.
| | - Jiahui Liu
- First College of Clinical Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250014, China.
| | - Yonggang Dai
- Department of Clinical Laboratory Medicine, Shandong Provincial Third Hospital, Jinan, 250014, China.
| | - Xiaohui Leng
- Department of Cardiovascular Medicine, Weifang Traditional Chinese Hospital, Weifang, 261000, China.
| | - Yan Cheng
- Department of Gastroenterology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250014, China.
| | - Lili Chi
- Department of Gastroenterology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, 250014, China.
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Kour V, Swain J, Singh J, Singh H, Kour H. A Review on Diabetic Retinopathy. Curr Diabetes Rev 2024; 20:e201023222418. [PMID: 37867267 DOI: 10.2174/0115733998253672231011161400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 07/08/2023] [Accepted: 08/23/2023] [Indexed: 10/24/2023]
Abstract
Diabetic retinopathy is a well-recognised microvascular complication of diabetes and is among the leading cause of blindness all over the world. Over the last decade, there have been advances in the diagnosis of diabetic retinopathy and diabetic macular edema. At the same time, newer therapies for the management of diabetic retinopathy have evolved. As a result of these advances, a decline in severe vision loss due to diabetes has been witnessed in some developing countries. However, there is a steady increase in the number of people affected with diabetes, and is expected to rise further in the coming years. Therefore, it is prudent to identify diabetic retinopathy, and timely intervention is needed to decrease the burden of severe vision loss. An effort has been made to review all the existing knowledge regarding diabetic retinopathy in this article and summarize the present treatment options for diabetic retinopathy.
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Affiliation(s)
- Vijender Kour
- Consultant Ophthalmology, Department of Ophthalmology, Sub District Hospital, Tral, Pulwama, India
| | - Jayshree Swain
- Department of Endocrinology, IMS and Sum Hospital, Siksha O Anusandhan (SOA) University, Bhubaneswar, India
| | - Jaspreet Singh
- Department of Endocrinology, IMS and Sum Hospital, Siksha O Anusandhan (SOA) University, Bhubaneswar, India
| | - Hershdeep Singh
- Consultant Neurosurgeon, Department of Neurosurgery, Fortis Ludhiana, Bhubaneswar, India
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Hu P, Li K, Peng X, Kan Y, Li H, Zhu Y, Wang Z, Li Z, Liu HY, Cai D. Nuclear Receptor PPARα as a Therapeutic Target in Diseases Associated with Lipid Metabolism Disorders. Nutrients 2023; 15:4772. [PMID: 38004166 PMCID: PMC10674366 DOI: 10.3390/nu15224772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 11/04/2023] [Accepted: 11/10/2023] [Indexed: 11/26/2023] Open
Abstract
Lipid metabolic diseases have substantial morbidity and mortality rates, posing a significant threat to human health. PPARα, a member of the peroxisome proliferator-activated receptors (PPARs), plays a crucial role in lipid metabolism and immune regulation. Recent studies have increasingly recognized the pivotal involvement of PPARα in diverse pathological conditions. This comprehensive review aims to elucidate the multifaceted role of PPARα in metabolic diseases including liver diseases, diabetes-related diseases, age-related diseases, and cancers, shedding light on the underlying molecular mechanisms and some regulatory effects of natural/synthetic ligands of PPARα. By summarizing the latest research findings on PPARα, we aim to provide a foundation for the possible therapeutic exploitation of PPARα in lipid metabolic diseases.
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Affiliation(s)
- Ping Hu
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
| | - Kaiqi Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
| | - Xiaoxu Peng
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
| | - Yufei Kan
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
| | - Hao Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
| | - Yanli Zhu
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
| | - Ziyu Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
| | - Zhaojian Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
| | - Hao-Yu Liu
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
- International Joint Research Laboratory in Universities of Jiangsu Province of China for Domestic Animal Germplasm Resources and Genetic Improvement, Yangzhou 225009, China
| | - Demin Cai
- College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; (P.H.); (K.L.); (X.P.); (Y.K.); (H.L.); (Y.Z.); (Z.W.); (Z.L.)
- International Joint Research Laboratory in Universities of Jiangsu Province of China for Domestic Animal Germplasm Resources and Genetic Improvement, Yangzhou 225009, China
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Pu Y, Cheng CK, Zhang H, Luo JY, Wang L, Tomlinson B, Huang Y. Molecular mechanisms and therapeutic perspectives of peroxisome proliferator-activated receptor α agonists in cardiovascular health and disease. Med Res Rev 2023; 43:2086-2114. [PMID: 37119045 DOI: 10.1002/med.21970] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 03/10/2023] [Accepted: 04/12/2023] [Indexed: 04/30/2023]
Abstract
The prevalence of cardiovascular disease (CVD) has been rising due to sedentary lifestyles and unhealthy dietary patterns. Peroxisome proliferator-activated receptor α (PPARα) is a nuclear receptor regulating multiple biological processes, such as lipid metabolism and inflammatory response critical to cardiovascular homeostasis. Healthy endothelial cells (ECs) lining the lumen of blood vessels maintains vascular homeostasis, where endothelial dysfunction associated with increased oxidative stress and inflammation triggers the pathogenesis of CVD. PPARα activation decreases endothelial inflammation and senescence, contributing to improved vascular function and reduced risk of atherosclerosis. Phenotypic switch and inflammation of vascular smooth muscle cells (VSMCs) exacerbate vascular dysfunction and atherogenesis, in which PPARα activation improves VSMC homeostasis. Different immune cells participate in the progression of vascular inflammation and atherosclerosis. PPARα in immune cells plays a critical role in immunological events, such as monocyte/macrophage adhesion and infiltration, macrophage polarization, dendritic cell (DC) embedment, T cell activation, and B cell differentiation. Cardiomyocyte dysfunction, a major risk factor for heart failure, can also be alleviated by PPARα activation through maintaining cardiac mitochondrial stability and inhibiting cardiac lipid accumulation, oxidative stress, inflammation, and fibrosis. This review discusses the current understanding and future perspectives on the role of PPARα in the regulation of the cardiovascular system as well as the clinical application of PPARα ligands.
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Affiliation(s)
- Yujie Pu
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Chak Kwong Cheng
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Hongsong Zhang
- Department of Cardiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Jiang-Yun Luo
- Institute for Cardiovascular Development and Regenerative Medicine, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Li Wang
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Brian Tomlinson
- Faculty of Medicine, Macau University of Science & Technology, Macau, China
| | - Yu Huang
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China
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Lee D, Tomita Y, Negishi K, Kurihara T. Pemafibrate, a potent selective peroxisome proliferator-activated receptor α modulator, a promising novel treatment for ischemic retinopathy? Neural Regen Res 2023; 18:1495-1496. [PMID: 36571350 PMCID: PMC10075098 DOI: 10.4103/1673-5374.360319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Deokho Lee
- Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Shinjuku-ku, Japan
| | - Yohei Tomita
- Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Shinjuku-ku, Japan
| | - Kazuno Negishi
- Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Shinjuku-ku, Japan
| | - Toshihide Kurihara
- Department of Ophthalmology, Keio University School of Medicine, Shinanomachi, Shinjuku-ku, Japan
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DeBoer C, Agrawal R, Rahimy E. Novel oral medications for retinal disease: an update on clinical development. Curr Opin Ophthalmol 2023; 34:203-210. [PMID: 36943473 PMCID: PMC10065955 DOI: 10.1097/icu.0000000000000948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
PURPOSE OF REVIEW Intravitreal and periocular injections for retinal disease provide a targeted delivery of medication to the eye. However, given risks of injections, including endophthalmitis, pain and treatment burden for both patients and retina specialists, there has been significant interest and effort in developing oral medications for the management of retinal disease. This article provides clinical and preclinical details of new oral medications in the pipeline for management of retinal disease. RECENT FINDINGS Several new oral medications show clinical and preclinical promise for the management of retinal disease, including macular degeneration, diabetic retinopathy and Stargardt disease. SUMMARY Oral medications provide promise for treating retinal disease, possibly increasing compliance, and reducing side effects of intravitreal or periocular injections. However, difficulties in this approach include systemic side effects and efficacy targeting the eye. There are multiple medications that are currently under investigation with the potential to act as stand-alone treatment or as an adjunct treatment for management of retinal diseases such as diabetic retinopathy, macular degeneration and Stargardt disease.
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Affiliation(s)
- Charles DeBoer
- Byers Eye Institute, Stanford University, Palo Alto, California, United States
| | - Rajat Agrawal
- Retina Global, Laguna Hills, California, United States
| | - Ehsan Rahimy
- Byers Eye Institute, Stanford University, Palo Alto, California, United States
- Department of Ophthalmology, Palo Alto Medical Foundation, Palo Alto, California, United States
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Kukal S, Bora S, Kanojia N, Singh P, Paul PR, Rawat C, Sagar S, Bhatraju NK, Grewal GK, Singh A, Kukreti S, Satyamoorthy K, Kukreti R. Valproic Acid-Induced Upregulation of Multidrug Efflux Transporter ABCG2/BCRP via PPAR α-Dependent Mechanism in Human Brain Endothelial Cells. Mol Pharmacol 2023; 103:145-157. [PMID: 36414374 DOI: 10.1124/molpharm.122.000568] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 10/26/2022] [Accepted: 11/03/2022] [Indexed: 11/23/2022] Open
Abstract
Despite the progress made in the development of new antiepileptic drugs (AEDs), poor response to them is a rising concern in epilepsy treatment. Of several hypotheses explaining AED treatment failure, the most promising theory is the overexpression of multidrug transporters belonging to ATP-binding cassette (ABC) transporter family at blood-brain barrier. Previous data show that AEDs themselves can induce these transporters, in turn affecting their own brain bioavailability. Presently, this induction and the underlying regulatory mechanism involved at human blood-brain barrier is not well elucidated. Herein, we sought to explore the effect of most prescribed first- and second-line AEDs on multidrug transporters in human cerebral microvascular endothelial cells, hCMEC/D3. Our work demonstrated that exposure of these cells to valproic acid (VPA) induced mRNA, protein, and functional activity of breast cancer resistance protein (BCRP/ABCG2). On examining the substrate interaction status of AEDs with BCRP, VPA, phenytoin, and lamotrigine were found to be potential BCRP substrates. Furthermore, we observed that siRNA-mediated knockdown of peroxisome proliferator-activated receptor alpha (PPARα) or use of PPARα antagonist, resulted in attenuation of VPA-induced BCRP expression and transporter activity. VPA was found to increase PPARα expression and trigger its translocation from cytoplasm to nucleus. Findings from chromatin immunoprecipitation and luciferase assays showed that VPA enhances the binding of PPARα to its response element in the ABCG2 promoter, resulting in elevated ABCG2 transcriptional activity. Taken together, these in vitro findings highlight PPARα as the potential molecular target to prevent VPA-mediated BCRP induction, which may have important implications in VPA pharmacoresistance. SIGNIFICANCE STATEMENT: Induction of multidrug transporters at blood-brain barrier can largely affect the bioavailability of the substrate antiepileptic drugs in the brains of patients with epilepsy, thus affecting their therapeutic efficacy. The present study reports a mechanistic pathway of breast cancer resistance protein (BCRP/ABCG2) upregulation by valproic acid in human brain endothelial cells via peroxisome proliferator-activated receptor alpha involvement, thereby providing a potential strategy to prevent valproic acid pharmacoresistance in epilepsy.
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Affiliation(s)
- Samiksha Kukal
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Shivangi Bora
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Neha Kanojia
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Pooja Singh
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Priyanka Rani Paul
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Chitra Rawat
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Shakti Sagar
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Naveen Kumar Bhatraju
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Gurpreet Kaur Grewal
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Anju Singh
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Shrikant Kukreti
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Kapaettu Satyamoorthy
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
| | - Ritushree Kukreti
- Genomics and Molecular Medicine Unit, Institute of Genomics and Integrative Biology (IGIB), Council of Scientific and Industrial Research (CSIR), Delhi, India (S.K., S.B., N.K., P.S., P.R.P., C.R., S.S., N.K.B., R.K.); Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India (S.K., N.K., P.S., P.R.P., C.R., S.S., R.K.); Department of Biotechnology, Delhi Technological University, Delhi, India (S.B.); Department of Molecular Biology and Genetic Engineering, School of Bioengineering and Biosciences, Lovely Professional University, Punjab, India (G.K.G.); Nucleic Acids Research Laboratory, Department of Chemistry (A.S., S.K) and Department of Chemistry, Ramjas College, University of Delhi (North Campus), Delhi, India (A.S.); and Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India (K.S.)
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8
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Lee D, Nakai A, Miwa Y, Negishi K, Tomita Y, Kurihara T. Pemafibrate prevents choroidal neovascularization in a mouse model of neovascular age-related macular degeneration. PeerJ 2023; 11:e14611. [PMID: 36643635 PMCID: PMC9838199 DOI: 10.7717/peerj.14611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 11/30/2022] [Indexed: 01/12/2023] Open
Abstract
Background Pathological choroidal neovascularization (CNV) is one of the major causes of visual impairment in neovascular age-related macular degeneration (AMD). CNV has been suppressed by using anti-vascular endothelial growth factor (VEGF) antibodies. However, some clinical cases have demonstrated the failure of anti-VEGF therapies. Furthermore, anti-VEGF agents might induce the development of ocular atrophy. Recently, peroxisome proliferator-activated receptor alpha (PPARα) activation using pemafibrate treatment was suggested as one of the promising therapeutic targets in the prevention of ocular ischemia. However, the preventive role of pemafibrate remains unclear in CNV. We aimed to examine the preventive role of pemafibrate on laser-induced pathological CNV. Methods Adult male C57BL/6 mice were orally supplied pemafibrate (0.5 mg/kg) for four days, followed by laser irradiation. Then, pemafibrate was consecutively given to mice with the same condition. CNV was visualized with isolectin-IB4. The eye (retina and/or retinal pigment epithelium [RPE]-choroid), liver, and serum were used for biomolecular analyses. Results We found that pemafibrate administration suppressed CNV volumes. Pemafibrate administration activated PPARα downstream genes in the liver and eye (especially, RPE-choroid). Furthermore, pemafibrate administration elevated serum fibroblast growth factor 21 levels and reduced serum levels of triglycerides. Conclusions Our data suggest a promising pemafibrate therapy for suppressing CNV in AMD.
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Affiliation(s)
- Deokho Lee
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Ayaka Nakai
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Nihon University School of Medicine, Tokyo, Japan
| | - Yukihiro Miwa
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan,Aichi Animal Eye Clinics, Aichi, Japan
| | - Kazuno Negishi
- Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Yohei Tomita
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Toshihide Kurihara
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan,Ophthalmology, Keio University School of Medicine, Tokyo, Japan
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9
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Lee D, Nakai A, Miwa Y, Tomita Y, Kunimi H, Chen J, Ikeda SI, Tsubota K, Negishi K, Kurihara T. Retinal degeneration induced in a mouse model of ischemia-reperfusion injury and its management by pemafibrate treatment. FASEB J 2022; 36:e22497. [PMID: 35969144 DOI: 10.1096/fj.202200455rrr] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 07/19/2022] [Accepted: 08/01/2022] [Indexed: 01/02/2023]
Abstract
Retinal ischemia-reperfusion (I/R) injury is a common cause of visual impairment. To date, no effective treatment is available for retinal I/R injury. In addition, the precise pathological mechanisms still need to be established. Recently, pemafibrate, a peroxisome proliferator-activated receptor α (PPARα) modulator, was shown to be a promising drug for retinal ischemia. However, the role of pemafibrate in preventing retinal I/R injury has not been documented. Here, we investigated how retinal degeneration occurs in a mouse model of retinal I/R injury by elevation of intraocular pressure and examined whether pemafibrate could be beneficial against retinal degeneration. Adult mice were orally administered pemafibrate (0.5 mg/kg/day) for 4 days, followed by retinal I/R injury. The mice were continuously administered pemafibrate once every day until the end of the experiments. Retinal functional changes were measured using electroretinography. Retina, liver, and serum samples were used for western blotting, quantitative PCR, immunohistochemistry, or enzyme linked immunosorbent assay. Retinal degeneration induced by retinal inflammation was prevented by pemafibrate administration. Pemafibrate administration increased the hepatic PPARα target gene expression and serum levels of fibroblast growth factor 21, a neuroprotective molecule in the eye. The expression of hypoxia-response and pro-and anti-apoptotic/inflammatory genes increased in the retina following retinal I/R injury; however, these changes were modulated by pemafibrate administration. In conclusion, pemafibrate is a promising preventive drug for ischemic retinopathies.
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Affiliation(s)
- Deokho Lee
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Ayaka Nakai
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Nihon University School of Medicine, Tokyo, Japan
| | - Yukihiro Miwa
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.,Aichi Animal Eye Clinic, Aichi, Japan
| | - Yohei Tomita
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Harvard Medical School, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Hiromitsu Kunimi
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Junhan Chen
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | - Shin-Ichi Ikeda
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
| | | | - Kazuno Negishi
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan
| | - Toshihide Kurihara
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo, Japan.,Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan
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10
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Danielsson H, Tebani A, Zhong W, Fagerberg L, Brusselaers N, Hård AL, Uhlén M, Hellström A. Blood protein profiles related to preterm birth and retinopathy of prematurity. Pediatr Res 2022; 91:937-946. [PMID: 33895781 PMCID: PMC9064798 DOI: 10.1038/s41390-021-01528-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 02/25/2021] [Accepted: 03/30/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND Nearly one in ten children is born preterm. The degree of immaturity is a determinant of the infant's health. Extremely preterm infants have higher morbidity and mortality than term infants. One disease affecting extremely preterm infants is retinopathy of prematurity (ROP), a multifactorial neurovascular disease that can lead to retinal detachment and blindness. The advances in omics technology have opened up possibilities to study protein expressions thoroughly with clinical accuracy, here used to increase the understanding of protein expression in relation to immaturity and ROP. METHODS Longitudinal serum protein profiles the first months after birth in 14 extremely preterm infants were integrated with perinatal and ROP data. In total, 448 unique protein targets were analyzed using Proximity Extension Assays. RESULTS We found 20 serum proteins associated with gestational age and/or ROP functioning within mainly angiogenesis, hematopoiesis, bone regulation, immune function, and lipid metabolism. Infants with severe ROP had persistent lower levels of several identified proteins during the first postnatal months. CONCLUSIONS The study contributes to the understanding of the relationship between longitudinal serum protein levels and immaturity and abnormal retinal neurovascular development. This is essential for understanding pathophysiological mechanisms and to optimize diagnosis, treatment and prevention for ROP. IMPACT Longitudinal protein profiles of 14 extremely preterm infants were analyzed using a novel multiplex protein analysis platform combined with perinatal data. Proteins associated with gestational age at birth and the neurovascular disease ROP were identified. Among infants with ROP, longitudinal levels of the identified proteins remained largely unchanged during the first postnatal months. The main functions of the proteins identified were angiogenesis, hematopoiesis, immune function, bone regulation, lipid metabolism, and central nervous system development. The study contributes to the understanding of longitudinal serum protein patterns related to gestational age and their association with abnormal retinal neuro-vascular development.
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Affiliation(s)
- Hanna Danielsson
- grid.4714.60000 0004 1937 0626Department of Microbiology, Tumor and Cell Biology, Centre for Translational Microbiome Research, Karolinska Institutet, Stockholm, Sweden ,grid.416648.90000 0000 8986 2221Sach’s Children’s and Youth Hospital, Södersjukhuset, Stockholm, Sweden
| | - Abdellah Tebani
- grid.5037.10000000121581746Science for Life Laboratory, Department of Protein Science, KTH—Royal Institute of Technology, Stockholm, Sweden ,grid.41724.340000 0001 2296 5231Department of Metabolic Biochemistry, Rouen University Hospital, Rouen, France ,grid.41724.340000 0001 2296 5231Normandie Univ, UNIROUEN, CHU Rouen, INSERM U1245, Rouen, France
| | - Wen Zhong
- grid.5037.10000000121581746Science for Life Laboratory, Department of Protein Science, KTH—Royal Institute of Technology, Stockholm, Sweden
| | - Linn Fagerberg
- grid.5037.10000000121581746Science for Life Laboratory, Department of Protein Science, KTH—Royal Institute of Technology, Stockholm, Sweden
| | - Nele Brusselaers
- grid.4714.60000 0004 1937 0626Department of Microbiology, Tumor and Cell Biology, Centre for Translational Microbiome Research, Karolinska Institutet, Stockholm, Sweden ,grid.5284.b0000 0001 0790 3681Global Health Institute, Antwerp University, Antwerp, Belgium ,grid.5342.00000 0001 2069 7798Department of Head and Skin, Ghent University, Ghent, Belgium
| | - Anna-Lena Hård
- grid.1649.a000000009445082XThe Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Mathias Uhlén
- grid.5037.10000000121581746Science for Life Laboratory, Department of Protein Science, KTH—Royal Institute of Technology, Stockholm, Sweden
| | - Ann Hellström
- The Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden.
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11
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Zhao H, Kong H, Wang B, Wu S, Chen T, Cui Y. RNA-Binding Proteins and Alternative Splicing Genes Are Coregulated in Human Retinal Endothelial Cells Treated with High Glucose. J Diabetes Res 2022; 2022:7680513. [PMID: 35308095 PMCID: PMC8926481 DOI: 10.1155/2022/7680513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 01/10/2023] Open
Abstract
To explore the relevant RNA-binding proteins (RBPs) and alternative splicing events (ASEs) in diabetic retinopathy (DR). We devised a comprehensive work to integrate analyses of the differentially expressed genes, including differential RBPs, and variable splicing characteristics related to DR in human retinal endothelial cells induced by low glucose and high glucose in dataset GSE117238. A total of 2320 differentially expressed genes (DEGs) were identified, including 1228 upregulated genes and 1092 downregulated genes. Further analysis screened out 232 RBP genes, and 42 AS genes overlapped DEGs. We selected high expression and consistency six RBP genes (FUS, HNRNPA2B1, CANX, EIF1, CALR, and POLR2A) for coexpression analysis. Through analysis, we found eight RASGs (MDM2, GOLGA2P7, NFE2L1, KDM4A, FAM111A, CIRBP, IDH1, and MCM7) that could be regulated by RBP. The coexpression network was conducted to further elucidate the regulatory and interaction relationship between RBPs and AS. Apoptotic progress, protein phosphorylation, and NF-kappaB cascade revealed by the functional enrichment analysis of RASGs regulated by RBPs were closely related to diabetic retinopathy. Furthermore, the expression of differentially expressed RBPs was validated by qRT-PCR in mouse retinal microvascular endothelial cells and retinas from the streptozotocin mouse model. The results showed that Fus, Hnrnpa2b1, Canx, Calr, and Polr2a were remarkedly difference in high-glucose-treated retinal microvascular endothelial cells and Fus, Hnrnpa2b1, Canx, and Calr were remarkedly difference in retinas from streptozotocin-induced diabetic mice compared to control. The regulatory network between identified RBPs and RASGs suggests the presence of several signaling pathways possibly involved in the pathogenesis of DR. The verified RBPs should be further addressed by future studies investigating associations between RBPs and the downstream of AS, as they could serve as potential biomarkers and targets for DR.
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Affiliation(s)
- Hongran Zhao
- Department of Ophthalmology, Qilu Hospital of Shandong University, Shandong University, Jinan, Shandong Province, China
- School of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Hui Kong
- School of Medicine, Shandong University, Jinan, Shandong Province, China
- Shandong University of Traditional Chinese Medicine, Jinan, Shandong Province, China
| | - Bozhao Wang
- Department of Ophthalmology, Qilu Hospital of Shandong University, Shandong University, Jinan, Shandong Province, China
- School of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Sihui Wu
- Department of Ophthalmology, Qilu Hospital of Shandong University, Shandong University, Jinan, Shandong Province, China
- School of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Tianran Chen
- School of Medicine, Shandong University, Jinan, Shandong Province, China
| | - Yan Cui
- Department of Ophthalmology, Qilu Hospital of Shandong University, Shandong University, Jinan, Shandong Province, China
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12
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Lee D, Tomita Y, Allen W, Tsubota K, Negishi K, Kurihara T. PPARα Modulation-Based Therapy in Central Nervous System Diseases. Life (Basel) 2021; 11:life11111168. [PMID: 34833044 PMCID: PMC8622664 DOI: 10.3390/life11111168] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 10/29/2021] [Accepted: 10/30/2021] [Indexed: 12/11/2022] Open
Abstract
The burden of neurodegenerative diseases in the central nervous system (CNS) is increasing globally. There are various risk factors for the development and progression of CNS diseases, such as inflammatory responses and metabolic derangements. Thus, curing CNS diseases requires the modulation of damaging signaling pathways through a multitude of mechanisms. Peroxisome proliferator-activated receptors (PPARs) are a family of nuclear hormone receptors (PPARα, PPARβ/δ, and PPARγ), and they work as master sensors and modulators of cellular metabolism. In this regard, PPARs have recently been suggested as promising therapeutic targets for suppressing the development of CNS diseases and their progressions. While the therapeutic role of PPARγ modulation in CNS diseases has been well reviewed, the role of PPARα modulation in these diseases has not been comprehensively summarized. The current review focuses on the therapeutic roles of PPARα modulation in CNS diseases, including those affecting the brain, spinal cord, and eye, with recent advances. Our review will enable more comprehensive therapeutic approaches to modulate PPARα for the prevention of and protection from various CNS diseases.
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Affiliation(s)
- Deokho Lee
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan;
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan;
| | - Yohei Tomita
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan;
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan;
- Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
- Correspondence: (Y.T.); (T.K.); Tel.: +1-617-919-2533 (Y.T.); +81-3-5636-3204 (T.K.)
| | - William Allen
- Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, USA;
| | | | - Kazuno Negishi
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan;
| | - Toshihide Kurihara
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan;
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan;
- Correspondence: (Y.T.); (T.K.); Tel.: +1-617-919-2533 (Y.T.); +81-3-5636-3204 (T.K.)
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13
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Updates on the Current Treatments for Diabetic Retinopathy and Possibility of Future Oral Therapy. J Clin Med 2021; 10:jcm10204666. [PMID: 34682788 PMCID: PMC8537579 DOI: 10.3390/jcm10204666] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 10/04/2021] [Accepted: 10/09/2021] [Indexed: 12/23/2022] Open
Abstract
Diabetic retinopathy (DR) is a complication of diabetes and one of the leading causes of vision loss worldwide. Despite extensive efforts to reduce visual impairment, the prevalence of DR is still increasing. The initial pathophysiology of DR includes damage to vascular endothelial cells and loss of pericytes. Ensuing hypoxic responses trigger the expression of vascular endothelial growth factor (VEGF) and other pro-angiogenic factors. At present, the most effective treatment for DR and diabetic macular edema (DME) is the control of blood glucose levels. More advanced cases require laser, anti-VEGF therapy, steroid, and vitrectomy. Pan-retinal photocoagulation for non-proliferative diabetic retinopathy (NPDR) is well established and has demonstrated promising outcomes for preventing the progressive stage of DR. Furthermore, the efficacy of laser therapies such as grid and subthreshold diode laser micropulse photocoagulation (SDM) for DME has been reported. Vitrectomy has been performed for vitreous hemorrhage and tractional retinal detachment for patients with PDR. In addition, anti-VEGF treatment has been widely used for DME, and recently its potential to prevent the progression of PDR has been remarked. Even with these treatments, many patients with DR lose their vision and suffer from potential side effects. Thus, we need alternative treatments to address these limitations. In recent years, the relationship between DR, lipid metabolism, and inflammation has been featured. Research in diabetic animal models points to peroxisome proliferator-activated receptor alpha (PPARα) activation in cellular metabolism and inflammation by oral fenofibrate and/or pemafibrate as a promising target for DR. In this paper, we review the status of existing therapies, summarize PPARα activation therapies for DR, and discuss their potentials as promising DR treatments.
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14
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Pemafibrate Prevents Retinal Dysfunction in a Mouse Model of Unilateral Common Carotid Artery Occlusion. Int J Mol Sci 2021; 22:ijms22179408. [PMID: 34502311 PMCID: PMC8431531 DOI: 10.3390/ijms22179408] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/21/2021] [Accepted: 08/27/2021] [Indexed: 12/14/2022] Open
Abstract
Cardiovascular diseases lead to retinal ischemia, one of the leading causes of blindness. Retinal ischemia triggers pathological retinal glial responses and functional deficits. Therefore, maintaining retinal neuronal activities and modulating pathological gliosis may prevent loss of vision. Previously, pemafibrate, a selective peroxisome proliferator-activated receptor alpha modulator, was nominated as a promising drug in retinal ischemia. However, a protective role of pemafibrate remains untouched in cardiovascular diseases-mediated retinal ischemia. Therefore, we aimed to unravel systemic and retinal alterations by treating pemafibrate in a new murine model of retinal ischemia caused by cardiovascular diseases. Adult C57BL/6 mice were orally administered pemafibrate (0.5 mg/kg) for 4 days, followed by unilateral common carotid artery occlusion (UCCAO). After UCCAO, pemafibrate was continuously supplied to mice until the end of experiments. Retinal function (a-and b-waves and the oscillatory potentials) was measured using electroretinography on day 5 and 12 after UCCAO. Moreover, the retina, liver, and serum were subjected to qPCR, immunohistochemistry, or ELISA analysis. We found that pemafibrate enhanced liver function, elevated serum levels of fibroblast growth factor 21 (FGF21), one of the neuroprotective molecules in the eye, and protected against UCCAO-induced retinal dysfunction, observed with modulation of retinal gliosis and preservation of oscillatory potentials. Our current data suggest a promising pemafibrate therapy for the suppression of retinal dysfunction in cardiovascular diseases.
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15
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Lee D, Tomita Y, Miwa Y, Jeong H, Mori K, Tsubota K, Kurihara T. Fenofibrate Protects against Retinal Dysfunction in a Murine Model of Common Carotid Artery Occlusion-Induced Ocular Ischemia. Pharmaceuticals (Basel) 2021; 14:ph14030223. [PMID: 33799938 PMCID: PMC7999063 DOI: 10.3390/ph14030223] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/01/2021] [Accepted: 03/04/2021] [Indexed: 01/01/2023] Open
Abstract
Ocular ischemia is a common cause of blindness and plays a detrimental role in various diseases such as diabetic retinopathy, occlusion of central retinal arteries, and ocular ischemic syndrome. Abnormalities of neuronal activities in the eye occur under ocular ischemic conditions. Therefore, protecting their activities may prevent vision loss. Previously, peroxisome proliferator-activated receptor alpha (PPARα) agonists were suggested as promising drugs in ocular ischemia. However, the potential therapeutic roles of PPARα agonists in ocular ischemia are still unknown. Thus, we attempted to unravel systemic and ocular changes by treatment of fenofibrate, a well-known PPARα agonist, in a new murine model of ocular ischemia. Adult mice were orally administered fenofibrate (60 mg/kg) for 4 days once a day, followed by induction of ocular ischemia by unilateral common carotid artery occlusion (UCCAO). After UCCAO, fenofibrate was continuously supplied to mice once every 2 days during the experiment period. Electroretinography was performed to measure retinal functional changes. Furthermore, samples from the retina, liver, and blood were subjected to qPCR, Western blot, or ELISA analysis. We found that fenofibrate boosted liver function, increased serum levels of fibroblast growth factor 21 (FGF21), one of the neuroprotective molecules in the central nervous system, and protected against UCCAO-induced retinal dysfunction. Our current data suggest a promising fenofibrate therapy in ischemic retinopathies.
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Affiliation(s)
- Deokho Lee
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan; (D.L.); (Y.T.); (Y.M.); (H.J.); (K.M.)
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Yohei Tomita
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan; (D.L.); (Y.T.); (Y.M.); (H.J.); (K.M.)
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan
- Boston Children’s Hospital/Harvard Medical School, Boston, MA 02115, USA
| | - Yukihiro Miwa
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan; (D.L.); (Y.T.); (Y.M.); (H.J.); (K.M.)
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan
- Animal Eye Care, Tokyo Animal Eye Clinic, Tokyo 158-0093, Japan
| | - Heonuk Jeong
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan; (D.L.); (Y.T.); (Y.M.); (H.J.); (K.M.)
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Kiwako Mori
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan; (D.L.); (Y.T.); (Y.M.); (H.J.); (K.M.)
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan
- Tsubota Laboratory, Inc., Tokyo 160-0016, Japan
- Correspondence: (K.T.); (T.K.); Tel.: +81-3-5636-3269 (K.T.); +81-3-5636-3204 (T.K.)
| | - Toshihide Kurihara
- Laboratory of Photobiology, Keio University School of Medicine, Tokyo 160-8582, Japan; (D.L.); (Y.T.); (Y.M.); (H.J.); (K.M.)
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan
- Correspondence: (K.T.); (T.K.); Tel.: +81-3-5636-3269 (K.T.); +81-3-5636-3204 (T.K.)
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16
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Fujita N, Sase K, Tsukahara C, Arizono I, Takagi H, Kitaoka Y. Pemafibrate prevents retinal neuronal cell death in NMDA-induced excitotoxicity via inhibition of p-c-Jun expression. Mol Biol Rep 2020; 48:195-202. [PMID: 33278012 PMCID: PMC7884588 DOI: 10.1007/s11033-020-06032-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 11/24/2020] [Indexed: 02/07/2023]
Abstract
Excitotoxicity is involved in the retinal neuronal cell death in diabetic retinopathy. Although fenofibrate has been shown to ameliorate the progression of diabetic retinopathy, the effect of pemafibrate, which is highly selective for peroxisome proliferator-activated receptor α on retinal neuronal cell death has not been documented. Here, we investigated whether pemafibrate exerts a beneficial effect against retinal ganglion cell (RGC) death induced by N-methyl-D-aspartate (NMDA) in rats. Experiments were performed on adult male Wistar rats that received an intravitreal injection of 20 nmol NMDA. Fluoro-Gold labeled RGC morphometry showed that oral intake of pemafibrate once a day for 7 days resulted in significant protection on RGC death induced by NMDA. Phosphorylated c-Jun protein, which is involved in apoptosis, was upregulated after NMDA exposure, and this increase was significantly lessened by the systemic pemafibrate treatment. Phosphorylated c-Jun immunopositive cells were colocalized with Thy-1 immunopositive cells, and the increased these cells were ameliorated by the pemafibrate treatment. An increase in TUNEL-positive cells was significantly suppressed by the pemafibrate treatment. Phosphorylated c-Jun immunopositive cells were colocalized with TUNEL-positive cells, and they were decreased by pemafibrate treatment. These results suggest that the RGC protection achieved with pemafibrate appears to be associated with inhibition of phosphorylated c-Jun and its anti-apoptotic effect.
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Affiliation(s)
- Naoki Fujita
- Department of Molecular Neuroscience, St. Marianna University Graduate School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kaswasaki, Kanagawa, 216-8511, Japan.,Department of Ophthalmology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kaswasaki, Kanagawa, 216-8511, Japan
| | - Kana Sase
- Department of Ophthalmology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kaswasaki, Kanagawa, 216-8511, Japan
| | - Chihiro Tsukahara
- Department of Ophthalmology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kaswasaki, Kanagawa, 216-8511, Japan
| | - Ibuki Arizono
- Department of Molecular Neuroscience, St. Marianna University Graduate School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kaswasaki, Kanagawa, 216-8511, Japan.,Department of Ophthalmology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kaswasaki, Kanagawa, 216-8511, Japan
| | - Hitoshi Takagi
- Department of Ophthalmology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kaswasaki, Kanagawa, 216-8511, Japan
| | - Yasushi Kitaoka
- Department of Molecular Neuroscience, St. Marianna University Graduate School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kaswasaki, Kanagawa, 216-8511, Japan.
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Small-Molecule Modulation of PPARs for the Treatment of Prevalent Vascular Retinal Diseases. Int J Mol Sci 2020; 21:ijms21239251. [PMID: 33291567 PMCID: PMC7730325 DOI: 10.3390/ijms21239251] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/29/2020] [Accepted: 12/02/2020] [Indexed: 02/08/2023] Open
Abstract
Vascular-related retinal diseases dramatically impact quality of life and create a substantial burden on the healthcare system. Age-related macular degeneration, diabetic retinopathy, and retinopathy of prematurity are leading causes of irreversible blindness. In recent years, the scientific community has made great progress in understanding the pathology of these diseases and recent discoveries have identified promising new treatment strategies. Specifically, compelling biochemical and clinical evidence is arising that small-molecule modulation of peroxisome proliferator-activated receptors (PPARs) represents a promising approach to simultaneously address many of the pathological drivers of these vascular-related retinal diseases. This has excited academic and pharmaceutical researchers towards developing new and potent PPAR ligands. This review highlights recent developments in PPAR ligand discovery and discusses the downstream effects of targeting PPARs as a therapeutic approach to treating retinal vascular diseases.
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PPARα Agonist Oral Therapy in Diabetic Retinopathy. Biomedicines 2020; 8:biomedicines8100433. [PMID: 33086679 PMCID: PMC7589723 DOI: 10.3390/biomedicines8100433] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/13/2020] [Accepted: 10/15/2020] [Indexed: 12/12/2022] Open
Abstract
Diabetic retinopathy (DR) is an eye condition that develops after chronically poorly-managed diabetes, and is presently the main cause for blindness on a global scale. Current treatments for DR such as laser photocoagulation, topical injection of corticosteroids, intravitreal injection of anti-vascular endothelial growth factor (VEGF) agents and vitreoretinal surgery are only applicable at the late stages of DR and there are possibilities of significant adverse effects. Moreover, the forms of treatment available for DR are highly invasive to the eyes. Safer and more effective pharmacological treatments are required for DR treatment, in particular at an early stage. In this review, we cover recently investigated promising oral pharmacotherapies, the methods of which are safer, easier to use, patient-friendly and pain-free, in clinical studies. We especially focus on peroxisome proliferator-activator receptor alpha (PPARα) agonists in which experimental evidence suggests PPARα activation may be closely related to the attenuation of vascular damages, including lipid-induced toxicity, inflammation, an excess of free radical generation, endothelial dysfunction and angiogenesis. Furthermore, oral administration of selective peroxisome proliferator-activated receptor alpha modulator (SPPARMα) agonists may induce hepatic fibroblast growth factor 21 expression, indirectly resulting in retinal protection in animal studies. Our review will enable more comprehensive approaches for understanding protective roles of PPARα for the prevention of DR development.
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Pemafibrate Protects Against Retinal Dysfunction in a Murine Model of Diabetic Retinopathy. Int J Mol Sci 2020; 21:ijms21176243. [PMID: 32872333 PMCID: PMC7503472 DOI: 10.3390/ijms21176243] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/25/2020] [Accepted: 08/25/2020] [Indexed: 12/16/2022] Open
Abstract
Diabetic retinopathy (DR) is one of the leading causes of blindness globally. Retinal neuronal abnormalities occur in the early stage in DR. Therefore, maintaining retinal neuronal activity in DR may prevent vision loss. Previously, pemafibrate, a novel selective peroxisome proliferator-activated receptor alpha modulator, was suggested as a promising drug in hypertriglyceridemia. However, the role of pemafibrate remains obscure in DR. Therefore, we aimed to unravel systemic and retinal changes by pemafibrate in diabetes. Adult mice were intraperitoneally injected with streptozotocin (STZ) to induce diabetes. After STZ injection, diet supplemented with pemafibrate was given to STZ-induced diabetic mice for 12 weeks. During the experiment period, body weight and blood glucose levels were examined. Electroretinography was performed to check the retinal neural function. After sacrifice, the retina, liver, and blood samples were subjected to molecular analyses. We found pemafibrate mildly improved blood glucose level as well as lipid metabolism, boosted liver function, increased serum fibroblast growth factor21 level, restored retinal functional deficits, and increased retinal synaptophysin protein expression in STZ-induced diabetic mice. Our present data suggest a promising pemafibrate therapy for the prevention of early DR by improving systemic metabolism and protecting retinal function.
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